• Seinfeld's Estelle Harris died on Saturday
  • The "Estelle Costanza" actress was 93
  • The Seinfeld cast is paying tribute

It's a sad day for all who loved Seinfeld. Fans and cast members alike are mourning the loss of actress Estelle Harris.

She played the fiery but loveable "Estelle Costanza," mother of "George Costanza," in the popular 1990s series. Estelle Harris passed away at the age of 93 on April 2.

Estelle Harris dies: The Seinfeld cast is mourning

Several Seinfeld actors have paid tribute to Estelle Harris. She had countless memorable scenes with her screen son "George," played by Jason Alexander. He shared touching words on social media today.

"One of my favorite people has passed - my tv mama, Estelle Harris," Alexander wrote on Twitter. "The joy of playing with her and relishing her glorious laughter was a treat. I adore you, Estelle. Love to your family. Serenity now and always."

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"Elaine" actress Julia Louis-Dreyfus responded to the sad news: "RIP Estelle Harris. I love you." She also added the hashtag "#serenitynow," from the Seinfeld episode where the "Costanzas" repeatedly shout the phrase.

It's another sad loss from the Seinfeld cast. Estelle Harris died of natural causes on April 2. Her passing follows "Frank Constaza" actor Jerry Stiller, who died in 2020.